Sterilizer



C. B. PELTON AND J. A.'HAND.

STERILIZER.

APPLICATION FILED JULY 3!, I920.

Patented July 12, '1921.

2 SHEETS-SHEET u.

Qvwenioc C. R. PELTON AND. J. A. HAND.

STERILIZER.

APPLICATION FILED JULY 31.1920.

1,384,403 a nt d July 12, 1921.

v v 2 SHEET$-SHEET 2.

00 cacao anus:

To allwhom c't may concern UNITED s'r 'rasrAren'r OFFICE- 1 .cnauncmr nrnmoiv ANDfJAY AH IF'A hTD or nnrnorrgmrcniqau.

' s'r ER ILizEnt- 1 uma; filed 'Ju ly ai,

Be it known that we, CHAUNCEY B. Pun; TON and JAY A. jHANp, citizens of the United States, residing at Detroit" in the county of Wayne and State of Michigan, have invented certainjnew'and useful Improvementsin Sterilizers, of whichthe following is a specification. ,2

' This invention relates to sterilizers and especially to sterilizers for dental nstruments, but, of course, it willv be obvious that the device may be used'for other sterilization. Y t f c It has for its object" an improvement 111 sterilizersof this character introducing new features of construction inthe arrangement of the basin with respect to the cabinet for better-heat insulation; a new and economlcal way for constructing, and assembling togetherthe parts of the outer shelhor 0&8". ing, and a .new and more econom cal" way of fastening the hingesto the casing. 1

The invention also involves a'novel basket construction, permitting the basket that carries the tools to be hung down in the water of the basin or lifted out ofthe water andsupported on the sides of the basin; 7

Still another feature of the im 'pro ved sterilizer is the arrangement of the heat ng element, switches a. and wiring under the;

basin; V i 1 These and other features will be better understood when the construction is understood indetail.

In the drawings,- Figure 1 is a front elevation of the 1m proved sterilizer. i a i .Fig. 2 is an end elevatlonof the same.

Fig. 3 is a vertical longitudinal section through the same. t f

Fig. 4: is a horizontal sectiontaken on theline 4:-4 of Fig. 3. c I i Fig. 5 is a fragmentary vertical section similar to the oneshown in Fig. 3, but with the basket in its upper position and the lid open. c v v Fig. 6 is a perspective ofone of the looking strips which bears one, of the hinge knuckles.

"Fig. 7"is a fragment of one end of the' basin viewed in plan, g

Fi 8 is i a fragmentary cross section showlng the automatic switch.

The outer shell or casing is constructed of sheet metal, a single piece a being bent to form front, the two ends and parts of if Specification'of Letters l atent.

Batented July 12, 1921.

are bent in'at b to form shoulders to receive the {cover ,Qc which is; secured thereto by small screwsjd. -The ends 'ofthe piece a are lrl fldy back into hooks at the back. A second piece of metal 7 is providedat each end withfolds or hooks h. vThelocking strips '(Fig, 6) .arethen slid into lock-seam relation with both sets of meeting folds ail ihto complete thebodyof the casingor s e The basin pr the-isterilizer is, casting,

passing through the holes m inzthe locking strips The outer] surface of the basin is spaced from the, shell, as clearly indicated inlFigql, to insulate the basin and prevent undue loss of heat and objectionable heat ing of the outer casing;

Atgone [end of the tolu'nite theshell and basin and at the otherv end the pivot screw o'fonthe cover-lifting lever}? screws intoflthe basin. 1 This cover-s.

liftin lever. is connected by a link jg. with t t so c g c c terilizer the drain cock njscrews intothebasln and serves also a lr thehingedlid 7 and the stop ,pin 3- isso;

placedjas tofstopthe' lever and link just beondthe center line between the two pivots.

encethe lid cannot fall down, and in fact cannot be. put down by pulling upon the lid, It can be easily brought down by opcrating the lever p.

The lid 1' is hinged a}. the aging by hm,- ingone knuckle t securedto the lid, while the other knuckle is formed atu by the end:

of thelocking strip ibeing bent around to form the, knuckle. (See Fig. 56.) p

One of the, important improvements is the :basket construction. a designates the arms :0, of peculiar construction connected by afwooden cross bar. ,Before the basket mesh is bent over the rod 2, the farm :vy is threadedon the rod 2 that forms the rim of; the basket. Each bar is provided with cesses 4 in the rim of the basin (see Fig;

7). The strip forming the arm is twisted at 5 and bent right angularly at 6 to form trayma'y 'be lifted out a rest which allows the tray or basket to 7 rest deep .in the basin, as shown in EigxB, .1

the rest 6 engaging in the recesses 4. of the basin rim. The inner shoulders 2 engage inside of the basket or tray and hold it firmly to prevent swaying. Thebasket or. of the'water and hung in the lifted position by grasping both handles, lifting outwardly and engaging the notches3 of the arms over thebasin rim atthe notches 4:, as shown in Fig. 5. The outer shoulders I 1 engage against the outside of thebasket I the plate 10 by the turned-over legs 12 at the corners. Threaded studs 13 screw into the bottom of the basin and nuts 14 clamp the plates, insulation and heating'element in place. 1

Now as to the designates the cord for'connection withany electrical supplyfixture. One wire from this cord goes'to the post'16 andthe other to the spring contact.17 of the automatic switch. The other contact 18 of the switch is insulated from the fcontacti1'7. 19is a copper bridging connection "between the contacts in the form of a frusto-conicalp'cup carried on' the end of a stem 20 normally urged to break the switch by the spring 21. The action of the spring 21 is resisted and the switch held closed bythe toggle'levers 22 (Fig. 8), one pivotally supportedby' the band 23. on the stem 20 and the other supported by theswitch hanger 24 clair'iped'to the bottom of the basin with theplates 1.0 and 11. The one levereis provided with an extension 25 forming in effect a bell crank;

26 is a thermostat ofmetals of different coeflicie'nts' of expansion j riveted to angle.

bracket27 inturn riveted to the inner-plate 10'. 28 is anadjusting screw on the extension 25. Injtheposition shown'in Fig. 8- the switch is closed and is held" closed because" the toggle arms are ontheir center line or just over. The toggle cannot" be broken by pullingin the direction of the center dine, I so i the spring cannot act un- .21' snaps the the switch. and turning, the handles wiring "and switches 15' til the toggle is broken at the knee. This is. accomplished by; the thermostat, when the sterilizer becomes too hot. The thermostat bowsand hardly contacts the screw 28 when the delicate toggle is broken and the spring switch. op en. The thermostat performs no It merely releases the spring which'does the work. The thermostat is never under stressluntil the sterilizer-heats up and it lightlyco'ntactsthe screw 28.. 'We do not claim theautomatic switch in this application because itsspecific construction is a different invention from l thfe subject matter of the other claims. Itis made the subject of a'separate application.

A hand-operated switch 29 serves to put in circuit'one, two or threecoilsofthe heat. ing elementto varythe amount of heat, but as thedetails of this are no part of the invention,"they are not shown. This switch also cuts oif the current where desired.

What we claim is: 5

1. In a sterilizer, a basin provided with a cover, a basket, and handle arms for hanging the basket solely fromfthe basin in-an upper and in a lower position, and in the. latter position with the cover closed upon the basin. 5

2. In a sterilizer,a basin, a basket', and

handles pivoted to the basketand adapted to hook over the upperfedgeof the basin in appreciable work in throwing.

a plurality of positions to hold the basket. 1;

in a plurality of positions in the basin.

3. In a sterilizer, a basin provided with recesses in its rim, a basket, handles'pivoted to the'basket and provided with arms 'hav-;

ing rests and notches, the latter alternately engaging the recesses ofthe rim'to hold the basket in two alternative positlons in the basin.

4. In a sterilizer, the combination ofla.

basin, a basket, handles provided-with arms pivoted to the basket andhaving means for engaging the basket in an upper and "lower position in. the basin ders forfengaging thebasket to prevent it from swayin e 5. In a sterilizer, the combination of a basin, a basket, handles provided with arms pivoted to the basket, the arms being notched on the under sides to hook over the rim of the basin to hold. the basket in lifted position and the arms being bent at a substantial right angle to hookovertheedge of the basin to hold the basket in its lower position with respect to the basin. 1..

Intestimony whereof we ,aflix oiir signatures. ,l ,f v.OHAUNCEY. RQPELTQN.

JAY A; HAND.

and also having shoulfit 

